Bag stapling machine



Dec. 1, 1936. w. N. BAKER ET AL BAG STAPLING MACHINE 3 Sheets-Sheet 1 Filed NOV. 15, 1934 E 7 ROBERT IV CZ/NDfllL ATTORNE oss c. HUB

Dec. 1, 1936. w. N. BAKER ET AL BAG STAPLING MACHINE Filed NOV. 15, .1934- 3 Sheets-Sheet 2 Dec. 1, 1936.. w, N, BAKER AL 2,062,439

BAG STAPLING MACHINE Filed-Nov 15, 1934 3 Sheets-Sheet s INVENTO WEAVER NorEs air/rm ATTORNEY Patented Dec.- 1, 1936 UNITED STATES- 2 2,962,439 BAG STAPLINGMACBINE Webster Noyes Baker, Baldwin, Ross 0. Hnrrelh, Great Kills, and Robert -N. Cundall, Lackawanna, N. Y., assignors to Bagpak, Inc., a corporation of Delaware Application November 15, 1934. Serial No. 753,119 I 11 Claims.

Our invention comprises a device for applying gusset holding means to the corners of an open mouth gusseted bag. such holding means being described and claimed in the copending application of Webster Noyes Baker, Harry C.Knode and J. Walker Grimm, filed concurrently herewith, Serial No. 753,118, filed November 15, 1934, entitled Bags, now Patent No. 2,017,838, dated Octob er 22, 1935.

1 The object of our invention is to devise means to form and apply strips of reinforcing material around the side edges of each comer of a bag and .to drive fastening means through the reinforcingstrip and the bag, the machine being adjusti able to accommodate varioussizes of bags. An advantage of our invention lies in the simplicity of construction and its universal adaptability.

Other and further objects and advantages of our invention will be apparent from the following description taken in connection with the accompanying drawings, wherein like numerals re-' fer to like parts throughout:

- Fig. 1 is a plan view of the machine as a whole;

Fig. 2 is a front elevation of the machine;

Fig. 3 is a partial detail view of the strip feeding mechanism;

Fig. 4 is a partial section of Fig. 5, taken along- Figs. 6, '7 and 8 are viewssimilar to Fig. 5. showing successive stages of the operation of the machine; and I Fig. 9 is a planview of -a corner of thefinished The machine comprises two stapling heads 20 and 2|, driven by a common motor 22. The stapling heads may be of any suitable type, and may insert fastening elements known as stapies, rivets, eyelets", etc., but preferably is of the type for inserting. and clinching wire staples, as illustrated. I

' The motor 22 is connected to the stapling heads through enclosed reducing gears 24 and 25 and i any well known one revolution clutch. 26 controlled by a treadle 21 or other control means. Engagement of clutch 26 turns shaft 28 through one revolution and causes a single cycle of operation. Shaft 28 is the drive shaft of head 20, and 1 drives shaft 29 of head 2| to operate the two heads in unison through sprocket 30 fixed to shaft 28, chain 3|, sprockets 32 and 33 fixed to a floating shaft 34, chain 35, and sprocket 3'5 fixed to shaft 29. Floating shaft 34 is supported by hearings in' arm 31, freely mounted on shaft .28,

- and in arms 38 and 39, freely mounted on shaft adjusted laterally by means of a screw 42 carried by the frame 43. Associated with head 20 is a bar 44 carrying a plate 45, and with head 2| is a bar 46 carrying a plate 41, the two plates constituting a bag supporting table.

The mechanism for folding a reinforcing strip over the corner of the bag and clinching the staple is as follows:

.Shaft 28 drives a shaft 50 through sprocket 5|, chain'52 and sprocket 53. Shaft 5!) drives a shaft 54 through bevel gears 55 and 56. Shaft 5| drives right .and left hand mechanisms, one only of. which need be described, the right end of shaft 54 having a long keyway' 51 to allow shifting of head 2 The left hand mechanism comprises a box cam 60 having cam slots GI and 62. Slot-5| rocks a lever 63 about pivot 64, and slot 62 rocks alever 65 about its pivot 56. Lever 63 is connected by a pin andslot to a forked bar Ill, and lever-65 is similarly connected to a knife 1 l bar Ill and lmife ll being slidably guided in bearings on a standard l2.

Mounted upon the plate 45 is a guide 15 extending over the table for a slight distance. The forward edge of the guide is flared to allow ready insertion of the corner of a bag and is so ar-, ranged as to compress the plies of the bag slightly and bring the corner thereof into proper relationship with the stapling mechanism. A back guide 16 is mounted upon bar 44 to limit the movement of the bag. Guide 15 is separated from guide 16 and a wide slot is cut into bar 44 at 1'! to provide clearance for rod 10, and the reinforcing strip as will presently appear. Slot I1 is extended at '18 to provide a seat for the end of lower fork l9 of rod 10. After a bag has been inserted and the clutch engaged, rod 10 is causedto move into slot 11 with the forks l9 and 80 straddling the edge of the bag as in Fig-7.

Shaft 54' drives a forwardly extending shaft ing feed wheels89 and 90 through gears 3| and 92, respectively. A portion of the peripheries 85 through bevel gears 86 and 81. At the forward end of shaft 85 is a gear 88 (Fig. 3) drivof wheels 89 andilli are provided with enlargements 93 and 9%, respectively, whichare preferably strips of rubber or some other frictional .material. A continuous strip of reinforcing ma clips I02 and I03 are mounted upon knife IM .and the bearing guide of knife II, respectively,

. and are so arranged as to grip the strip I with suflicient force to prevent it from dropping when the feed wheels clear the strip (Fig. 6). At the instant that the feed wheels clear the strip, knife II is actuated to cut a suitable length from the strip thereby creating the reinforcing strip,

' m which is bent around the edge of the bag.

At practically the same instant the forward flaring tips of forks I9 and 80 engage the strip and bend it around the edge of the bag as indicated in Figs. 6 and 7, the slot '11 in bar allowing the lower end of the reinforcing strip to be bent upward.

The stapling head 20 is provided with the usual staple and hammer guide I I0 which is so timed as to start its downward movement as the upper end of the reinforcing strip is bent around the bag. Fork 80 is provided with a slot III to receive the lower end of the staple guide, allowing it to rest upon the upper surface of the reinforcing strip. During ,this time rod 10 and knife H remain stationary while wheels 89 and 90 continue to revolve. lower fork 19, which is now .supported by the lower side of slot 18, acting as the anvil to clinch the staple. Immediately afterwards rod 10, knife H and staple guide H0 are withdrawn to the position of Fig. 5, and feed wheels 89 and 90 come to rest before the enlargements engage the strip I00, to be in readiness for the next operation.

The opposite edge of the bag is treated simultaneously in the same fashion by similar mechanism except that it is a right hand device instead of a left hand device and is movable with alterations as some within the scope of the following claims, which are to be broadly construed. We claim: 1. In combination; means for positioning a stripof reinforcing material over each corner of an open, mouth bag; and meansfor applying fastening'means to retain said strips in position upon the bag comprising opposed fastening mechanisms; one of which is movable upon a common support toward and away from the other of saidmechanisms, and means for driving one of said mechanisms'from the other, said means allowing movement'of the movable mechanism upon said support.

In combination; means for positioning a strip of reinforcing material over each corner of an opemmouth bag; and means for applying fastening means to retain said strips in position upon the bag comprising opposed fastening mechanisms, one of which is movable upon; a

common support toward and -away from the other .of said mechanisms, a drive shaft associated with each fastening mechanism, one of said In Fig. 8 the staple has been driven, the

drive shafts being driven from the other, and

a floating shaft through which motion is transmitted fromone'drive shaft to theother. 3. In a machine for applying fastening means to the corner of a bag, a forked rod, and means 5 to move said rod into position straddling the edge of the bag, the upper fork of said rod being formed to allow. fastening means to be driven therethrough, and the lower fork of said rod comprising an anvil against which said fastening 10 means is driven.

4. In a machine for applying fastening means to the corner of a bag, a forked rod, means to move said rod into position straddling the edge of the bag, the upper fork of said rod being slotted 15 to allow fastening means to be driven therethrough, the lower fork of said rod comprising an anvil against which said fastening means is driven, and means to position a strip of reinforcing material between the edge' of the bag 20 and the ends of said rod, before movement of said rod past the edge of the bag, to be engaged thereby and folded over the edge of the bag.

5. In a machine for applying fastening means to the comer of a bag, 'a forked rod, means to 25 move said rod into position straddling the edge. of the bag, the upper fork of said rod being slotted to allow fastening means to be driven therethrough, the lower fork of said rod comprising an anvil against which said fastening means is driv- V en, and means comprising a pair of wheels having enlarged portions to position a strip of reinforcing material between the edge of the bag and the ends of said rod, before movement of 6. In a machine for applying fastening means to the corner of a bag, a forked rod, means to move said rod into position straddling the edge of the bag, the upper fork of said rod being 40 slotted to allow fastening means to be driven therethrough, the lower fork of said rod comprising an anvil against which said fastening means is driven, means to position the end of a continuous strip of reinforcing material between 45 the edge of the bag and the'ends-of said rod before movement of said rod past the edge of the bag, and means to sever said end from said strip as said forked rod engages the same to hold it against the bag. j I Y 4 '7. In a machine for applying fastening means to the corner of a bag, a forked rod, means to .move said rod into position straddling the edge of the bag, the upper fork of said rod being slotted to allow fastening. means to be driven 55 therethrough, the lower fork of said rod comprising an anvil against which said fastening means is driven, means comprising a pair of wheels having enlarged portions to position the end of a continuous strip of reinforcing maso terial between the edge of the bag and the end of said rod,and means to sever the end of said strip from the remainder thereof.

8. A machine for applying fastening means to the comers of bags'comprising, spaced stapling 55 heads, strip feeding and severing means associated with each stapling head, means to fold a severed piece of reinforcing material around each corner of the bag, and a common drive for all of said means. 7

9. A machine for applying fastening means to the comers of bags comprising, spaced stapling heads, strip feeding and severing means associated with each stapling head, means to fold a piece of reinforcing material around each comer of the 'bag, a common drive for all of said means, and a one-revolution clutgh associated therewith to allow intermittent operation of said means.

10. In a machine for applying gusset holding means to the corner of a bag, means to fold the end of a strip of material over the edge of the bag, means to separate the end to be folded from. the remainder of said strip, and means to staple said end in folded position to the bag.

11. In a machine'for applying guset holding means to the homer of a bag, means to fold the end of a strip oi. material over the edge of the bag, a shear and mechanism causing said shear to separate said end from the remainder of said strip, and means to drive an element through '5 the folded end and the bag.

w. NoYEs BAKER. ROSS c. HURREY.

R OBERT N. CUNDALL 10 

